![]() Checked aggregations were not used during the set of MDX queries the trace monitoried. Unchecked aggregations denote how many agg hits occurred. You are then shown a tree of all the aggregations. If you chose a live trace, click Stop Trace when you are done: When you click Execute, it displays the progress. Otherwise, caching might cause some agg hits to be missed. When running your workload of MDX queries, it is a best practice to clear the cache between each query. To change this, right click on the project node in Solution Explorer and choose Properties, click Deployment on the left, then change the Target Server and Database properties. The server and database name are taken from the deployment options for your project. Note that the server and database name mentioned in this screen must correctly point to the database where MDX queries will (or have been) run. (See the bottom for instructions on how to setup that trace.) If you have already used Profiler to save a trace to a SQL table when you previously ran through your workload of MDX queries, then choose the “Existing Trace Saved to SQL Table” option. If you wish to leave SSDT open while you run through your entire set of MDX queries, then choose the “New In-Memory Live Trace” option. Then either click on the cube node or the Aggregation Designs folder under a measure group node: To launch this feature, first open Aggregation Manager. It uses a trace to capture the aggregation hits for a set of MDX queries it then shows you a list of the aggregations which were not hit and offers to delete those aggregations. The Delete Unused Aggregations feature of BI Developer Extensions automates this process. Detecting which aggregations are unused and deleting them is currently a very manual process in Analysis Services.
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